Abstract
The behavior of a linear statistical copolymer poly(N-isopropylacrylamide) with maleic acid at a fixed pH value and two widely different concentrations (0.4 and 1.5 g/dL) is investigated by the methods of static and dynamic light scattering in dilute aqueous solutions. Studies were carried out in a wide temperature range – from 19 to 60°C. It is shown that at room temperature in the solutions of both concentrations there are three types of particles: unimolecular micelles, micelle-like structures, and aggregates. The fraction of micelle-like structures and aggregates increases when the concentration is decreased. The sizes of all the particles present in solution are independent of the concentration. It was found that dilution increases the starting temperature of the interval of phase separation and its width.
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